diff --git a/aeat.py b/aeat.py
index 39f1344..873a183 100644
--- a/aeat.py
+++ b/aeat.py
@@ -19,7 +19,6 @@ from pyAEATsii import mapping
 from pyAEATsii import callback_utils
 
 from trytond.model import ModelSQL, ModelView, Model, fields, Workflow
-from trytond.model import Model
 from trytond.pyson import Eval
 from trytond.pool import Pool
 from trytond.transaction import Transaction
@@ -367,6 +366,7 @@ class SIIReport(Workflow, ModelSQL, ModelView):
         else:
             default = default.copy()
         default['communication_state'] = None
+        default['csv'] = None
         return super(SIIReport, cls).copy(records, default=default)
 
     @classmethod
diff --git a/invoice.py b/invoice.py
index 451fdfe..20d3d5b 100644
--- a/invoice.py
+++ b/invoice.py
@@ -54,6 +54,13 @@ class Invoice:
             'sii_received_key', 'sii_issued_key', 'sii_subjected_key',
             'sii_excemption_key', 'sii_intracomunity_key']
 
+    @staticmethod
+    def default_sii_book_key():
+        type_ = Transaction().context.get('type', 'out_invoice')
+        if type_.startswith('in_'):
+            return 'R'
+        return 'E'
+
     @staticmethod
     def default_sii_operation_key():
         type_ = Transaction().context.get('type', 'out_invoice')
diff --git a/locale/es_ES.po b/locale/es_ES.po
index f94a79a..58dd6d3 100644
--- a/locale/es_ES.po
+++ b/locale/es_ES.po
@@ -18,7 +18,7 @@ msgctxt "field:account.invoice,sii_book_key:"
 msgid "SII Book Key"
 msgstr "Clave de Libro"
 
-msgctxt "field:account.invoice,sii_excemption_cause:"
+msgctxt "field:account.invoice,sii_excemption_key:"
 msgid "Excemption Cause"
 msgstr "Exención"
 
@@ -46,7 +46,7 @@ msgctxt "field:account.invoice,sii_state:"
 msgid "SII State"
 msgstr "Estado SII"
 
-msgctxt "field:account.invoice,sii_subjected:"
+msgctxt "field:account.invoice,sii_subjected_key:"
 msgid "Subjected"
 msgstr "Sujeta"
 
@@ -318,31 +318,31 @@ msgctxt "selection:account.invoice,sii_book_key:"
 msgid "Received Invoices"
 msgstr "Facturas recibidas"
 
-msgctxt "selection:account.invoice,sii_excemption_cause:"
+msgctxt "selection:account.invoice,sii_excemption_key:"
 msgid ""
 msgstr " "
 
-msgctxt "selection:account.invoice,sii_excemption_cause:"
+msgctxt "selection:account.invoice,sii_excemption_key:"
 msgid "Excempt. Article 20"
 msgstr "Exenta por el artículo 20"
 
-msgctxt "selection:account.invoice,sii_excemption_cause:"
+msgctxt "selection:account.invoice,sii_excemption_key:"
 msgid "Excempt. Article 21"
 msgstr "Exenta por el artículo 21"
 
-msgctxt "selection:account.invoice,sii_excemption_cause:"
+msgctxt "selection:account.invoice,sii_excemption_key:"
 msgid "Excempt. Article 22"
 msgstr "Exenta por el artículo 22"
 
-msgctxt "selection:account.invoice,sii_excemption_cause:"
+msgctxt "selection:account.invoice,sii_excemption_key:"
 msgid "Excempt. Article 24"
 msgstr "Exenta por el artículo 24"
 
-msgctxt "selection:account.invoice,sii_excemption_cause:"
+msgctxt "selection:account.invoice,sii_excemption_key:"
 msgid "Excempt. Article 25"
 msgstr "Exenta por el artículo 25"
 
-msgctxt "selection:account.invoice,sii_excemption_cause:"
+msgctxt "selection:account.invoice,sii_excemption_key:"
 msgid "Excempt. Other"
 msgstr "Exenta, otros"
 
@@ -616,15 +616,15 @@ msgctxt "selection:account.invoice,sii_state:"
 msgid "Rejected"
 msgstr "Rechazado"
 
-msgctxt "selection:account.invoice,sii_subjected:"
+msgctxt "selection:account.invoice,sii_subjected_key:"
 msgid ""
 msgstr " "
 
-msgctxt "selection:account.invoice,sii_subjected:"
+msgctxt "selection:account.invoice,sii_subjected_key:"
 msgid "Subjected - Not Excempt"
 msgstr "Sujeto - No exento."
 
-msgctxt "selection:account.invoice,sii_subjected:"
+msgctxt "selection:account.invoice,sii_subjected_key:"
 msgid "Subjected - Not Excempt ,  Inv. Suj. Pass"
 msgstr "No exenta - Con Inversion sujeto pasivo"
 
@@ -694,7 +694,7 @@ msgstr "Cancelado"
 
 msgctxt "selection:aeat.sii.report,state:"
 msgid "Confirmed"
-msgstr "Confirmados"
+msgstr "Confirmado"
 
 msgctxt "selection:aeat.sii.report,state:"
 msgid "Done"